216486969 has 8 divisors (see below), whose sum is σ = 303841440. Its totient is φ = 136728576.

The previous prime is 216486961. The next prime is 216486979. The reversal of 216486969 is 969684612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216486969 - 2³ = 216486961 is a prime.

It is a super-2 number, since 2×216486969² = 93733215493613922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216486961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898952 + ... + 1899065.

It is an arithmetic number, because the mean of its divisors is an integer number (37980180).

Almost surely, 2^216486969 is an apocalyptic number.

It is an amenable number.

216486969 is a deficient number, since it is larger than the sum of its proper divisors (87354471).

216486969 is a wasteful number, since it uses less digits than its factorization.

216486969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3798039.

The product of its digits is 1119744, while the sum is 51.

The square root of 216486969 is about 14713.4961514930. The cubic root of 216486969 is about 600.4505587988.

The spelling of 216486969 in words is "two hundred sixteen million, four hundred eighty-six thousand, nine hundred sixty-nine".